John zimmbb



, J.. ZIMMER. 11111111108 P011v 801111118 AND 81111111111181110111 ANDOTH-B11 METALS.

8 No. 78,172. Patented May 19, 186.8.

85TH. .z' E

@with fates @anni @fnf vJOHN ZIMMER, OF PITTSBUR-G, PENNSYLVANIA.

Letters "Patent No. 78,172, elated Mag/ 19,1868.

IMPRDVEMENT IN- FURNAGES FOR BOILING AND PUDDLING'IBON AND THR METALS.'n

TO ALL WHOM IT MAY CONCERN: A

Be it known that I, JonNZIMMEn, of the city of Pittsburg, in the countyof Allegheny, and State of'Pennsylvania, have invented a new and usefulImprovement inA Furnaces for Boiling and Paddling Iron and other Metals;and I hereby declare that the' following is a full, clear, and exactdescription of my invention,` reference being had to the accompanyingdrawings, forming part of this Vspecification;and to the letters ofreference marked thereon. 4 The nature f myinvention consists in formingthe chamber or basin of paddling-furnaces with waterspaces or boshe's'therein, and lso' connecting said lbos'hes' with an elevated tank orreservoir, bymeansof supply andreturn-pipes, as that the same water usedfor keeping the basin cool inaybe returnedto the tank, andemployedcontinually without wastcexcept such as may pass off byevaporation or as steam. A

To enable others tounderstand, make, and put in operationmyninventiomIA-'will proceed to doscri'beits i ,construction byreference to the' annexed drawings, wherein- Y Figure represents alongitudinal vertical section of a paddling-furnace' provided with myimprovements. Figure 2 repnescnts a transverse longitudinal section ofthe furnace and basin.` Figure 3 is a .front elevation o the furnace,showing theppes and end view of the water-tank or reservoir. A.ll theparts-are'lettered, and similar letters indicate like parts in theseveral views.V i

In moet paddling-furnaces heretofore constructed, the basin or chamber,wherein the metal is brought to its proper condition for working, is amere'ca'sbiron shell, lined with rire-brick, o'r other refractorysubstance, inlaid with'pulverizediron ore, German clay, -and water,incorporated with-other ingredients, and denominated iix to lenable itto withstand the `intense heat towhich it m'ust necessarilv be subeeted;and as allthis s Y y .l

requires-constant attention, continual` repair, attended witlrloss oftime, and, as' a consequence, money,'-I have attempted, audmy inventionisfdesigned, to obviatethose disadvantages. With this `ri'ew, -Iconstruct my furnace' in any'of the well-known forms, and with-the usualappliances and appendages` incident to' such furnaces. But, vordex'ftoovercome the diicnlties'hereinbefore mentioned, I make the vbasirierpaddling-chamber' C of cest iron, and-of one or'more pieces, the sides,S, of which are castwith a hollowpace"o1`- water bosh," B,

therein, and'extending along the centre' of each casting, in the mannerindicated bytheotted lines in iig. 1 2,

thev ends being closed to prei'ent leakage 'of water or steam, at theupper side; end :near the Ven dof each piece, and communicating with theinterioro'r bosh B," is a round hole or opening, X',to "each lof whieh'lattachant upright pipe long enough to rea-ch `a short distance'above thetop, A, of the furnace,' and-'where'theyall temif nate in n largowater-tank, F.' The pipes, L, at'one'endof each bosh, B, just passthroughthe bottom of this tank, whileV the other pipes, D, extend up.theloutside, their upper ends being' turned down a short distance toform a spout, Aso asto em'ptyinto the tank from abovcLas see'n at iig.3.

The operation is Aasfollows: Water being placedY in the tank F, it willilew down the short pipes L, and fill the'space'or'bosh B in theeast-iron'sides of the puddling-ehamber Gfwhen', on a lire being startedin `the furnace, the heat will soon. be suicient to generato steam inthe bosh, and the pressure will, asitjncreases, cause the water to'passup the long pipes D and discharge into the tank li' above the furnace,and, atthe sameI time, the water in the tank will rush down the shortpipes L into the -hosh-B, .to take the place of that'discharged,thus-keeping up a perfect .and continuous circulation of water aroundthe paddling-chamber, and maintaining' the sides at a propertemperature, so as to avoid' the 'troubles andv diiculties so common inall paddlingurnaees'constructed and worked in the ordinary manner.l

' Having thus brielly stated the nature of my iiivention- .I claim acast-iron paddling-basin or chamber, having a bosh o1\`waterspn.ce casttherein around its sides, in combination with'anleyated water-tank, andcommunicating with eachother by means of supply and-outletpipee, lthewhole being constructed, arranged, and operating substantially` as andfor the purposes herein set forth;

v i JOHN ZIMMER.

'Witnessesz 'Josmu W. Enns, Wn. F. GRAHAM,

